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Finding the Fourth Proportional to 424,229.32, 636,208.66 and 139,866.88

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Solution

The fourth proportional to 424,229.32, 636,208.66 and 139,866.88 is: 209,755.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,229.32 : 636,208.66 = 139,866.88 : x
  2. Step 2: Convert to fraction form
    424,229.32/636,208.66 = 139,866.88/x
  3. Step 3: Cross multiply
    424,229.32x = 636,208.66 × 139,866.88
  4. Step 4: Simplify right side
    424,229.32x = 88,984,520,303.18
  5. Step 5: Solve for x
    x = 88,984,520,303.18/424,229.32
  6. Step 6: Final answer
    x = 209,755.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.